Nut-lock



' T. H. SMITH.

NUT LOOK.

(No Model.)

V No. 532,169.

Patented Jan. 8, 1895.

Waaea.

UNITED STATES PATENT OFFICE.

THOMAS H. SMITH, OF EIGI-ITY-FOUR, PENNSYLVANIA.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 532,169, dated January8, 1895.

Application filedA ri] 6,1894. Serial No. 506,646. (No model.)

to which it pertains to make and use the same, reference being had tothe accompany- .ing drawings, which form a part of this specification,in which Figure 1 indicates a horizontal section of two adjacent rails,showing the application of my improved nut lock. Fig. 2 is an elevationof the same. Fig. 3 is an end elevation of a rail, with the nut lockapplied. Figs. 4. and 5 are respectively an end elevation and a plan ofthe lock block. Figs. 6 and 7 are respectively a plan and side elevationof serrated nut.

My invention relates to that class of devices, adapted to prevent a nutfrom unscrewing, or working off from a threaded bolt, and called nutlocks, and consists of the novel construction and arrangement of partshereinafter set forth, reference being had to the accompanying drawings,forming part hereof, in which likefigures indicate like parts whereverthey occur.

Referring to said drawings 1-1 are adjacent portions of two rails.

2 is a plate having a portion 3 thereof of greater thickness than theremaining part,

forming a shoulder in which a bolthole 4 is formed, for the reception ofthe bolt 5, which passes through similar holesin the rails and splicebars 6-6. Said plate 2 is provided with an oblique slot 7, whichterminates in a horizontal slot 8, immediately rearward of the bolthole4 in the thick portion of said plate.

which the lock block 10, rests when the upper inner edge of the sameengages the nut 11, the inner portion 12 being circular in shape and ofgreater diameter than the outer portion and serrated or toothed to admitof this, thus locking said nut, and preventing the same from turningwhen screwed tight upon the bolt. Said lock block is formed of two bars13 and 14, connected by a horizontal cylindrical or oblong stem 15, theinner bar 13, being of a thickness equal to the shoulder formed on theplate 2 and adapted to move freely in the recess formed between thesplice bars 6-6 and said plate 2.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1s

In a nut lock, the combination of the nut, the inner end of which iscircular in shape, and of greater cross section than the outer portionof the same, and the periphery having serrations or teeth, a platehaving a bolthole in one end of the same, and a slot extending towardthe end opposite said bolthole, the end of said slot adjacent saidbolthole extending below the lower edge of said bolthole, in combinationwith a lock block, adapted to rest in the end of the slot in said plateadjacent to said nut, and to engage the teeth thereon, substantially asand for the purpose herein described.

In testimony that I claim the foregoing I hereunto affix my signatureand seal this 3d day of March, A. D. 1894.

In presence of J AS. .I. MOAFEE, C. A. WILLIAMS.

